Objectives: A meta-analysis was conducted in order to generate more understanding regarding the efficacy of aftercare programs in reducing the recidivism rates of juvenile offenders reentering their communities following a period of custody. Method: 30 eligible primary studies were obtained through a systematic literature review and were coded. Recidivism was the outcome variable and 11 moderating variables were grouped according to either a sample, treatment, methodological, or study characteristic. A summary effect size was computed while moderator analyses and meta-regression were also conducted. Results: The summary effect size of aftercare programs was non-significant but subgroup univariate and multivariate analyses yielded significant treatment effects for samples of youth who averaged over 16.5 years of age and whose predominant index offense was violent. Well-implemented aftercare programs also yielded substantial treatment effects. Conclusion: The findings suggest that under specific conditions aftercare can reduce recidivism rates for youth involved in the juvenile justice system.